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经营范围
发明名称
TEACHING AIDS
摘要
申请公布号
KR940005115(Y1)
申请公布日期
1994.07.29
申请号
KR19910022517U
申请日期
1991.12.17
申请人
PARK, YONG - DONG
发明人
PARK, YONG - DONG
分类号
G09B1/00;(IPC1-7):G09B1/00
主分类号
G09B1/00
代理机构
代理人
主权项
地址
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